diff --git a/lib/file-encryptor.js b/lib/file-encryptor.js
index 33deefe..df6906c 100644
--- a/lib/file-encryptor.js
+++ b/lib/file-encryptor.js
@@ -59,6 +59,7 @@ Encryptor.decryptFile = function(inputPath, outputPath, key, options, callback)
   });
 
   inputStream.on('end', function() {
+  cipher.setAutoPadding(false);
     try {
       var buf = new Buffer(cipher.final('binary'), 'binary');
       outputStream.write(buf);